PILIPENKO, A. Yu.; PRIKHOD’KO, Yu. E. On the Limit Behavior of a Sequence of Markov Processes Perturbed in a Neighborhood of the Singular Point. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 67, n. 4, p. 499–516, 2015. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2000. Acesso em: 5 dec. 2025.